feat: add option to stop git.find at a directory

README.md

@@ -124,7 +124,8 @@ or a file named `.git`.
 Given a path, walk up the file system tree until a git repo working
 directory is found. Since this calls `stat` a bunch of times, it's
 probably best to only call it if you're reasonably sure you're likely to be
-in a git project somewhere.
+in a git project somewhere. Pass in `opts.root` to stop checking at that
+directory.
 
 Resolves to `null` if not in a git project.
 

lib/find.js

@@ -1,15 +1,15 @@
 const is = require('./is.js')
-const { dirname } = require('path')
+const { dirname, sep } = require('path')
 
-module.exports = async ({ cwd = process.cwd() } = {}) => {
- if (await is({ cwd })) {
- return cwd
- }
- while (cwd !== dirname(cwd)) {
- cwd = dirname(cwd)
+module.exports = async ({ cwd = process.cwd(), root = sep } = {}) => {
+ while (true) {
  if (await is({ cwd })) {
  return cwd
  }
+ const next = dirname(cwd)
+ if (cwd === root || cwd === next) {
+ return null
+ }
+ cwd = next
  }
- return null
 }

test/find.js

@@ -1,4 +1,5 @@
 const t = require('tap')
+const { join } = require('path')
 const find = require('../lib/find.js')
 
 t.test('find the git dir many folders up', t => {
@@ -10,6 +11,24 @@ t.test('find the git dir many folders up', t => {
  return t.resolveMatch(find({ cwd: path }), root)
 })
 
+t.test('stop before root dir', t => {
+ const root = t.testdir({
+ '.git': { index: 'hello' },
+ a: { b: { c: { d: { e: {} } } } },
+ })
+ const path = `${root}/a/b/c/d/e`
+ return t.resolveMatch(find({ cwd: path, root: join(root, 'a') }), null)
+})
+
+t.test('stop at root dir', t => {
+ const root = t.testdir({
+ '.git': { index: 'hello' },
+ a: { b: { c: { d: { e: {} } } } },
+ })
+ const path = `${root}/a/b/c/d/e`
+ return t.resolveMatch(find({ cwd: path, root }), root)
+})
+
 t.test('find the git dir at current level', t => {
  const cwd = t.testdir({
  '.git': { index: 'hello' },